Changes in squid-6.6 (5 Dec 2023):
- Bug 5328: Fix ESI build with libxml2 v2.12.0
- Bug 5319: QOS Netfilter MARK preservation is always disabled
- Bug 5318: peer_digest.cc:399: "fetch->pd && receivedData.data"
- Bug 5317: FATAL attempt to read data from memory
- Bug 5154: Do not open IPv6 sockets when IPv6 is disabled
- FTP: Ignore credentials with a NUL-prefixed username
- log_db_daemon: Fix DSN construction
- Limit the number of allowed X-Forwarded-For hops
- Do not update StoreEntry expiration after errorAppendEntry()
- improve handling of response sending errors